HIIT study: Servers run well around zero degrees

Lots of energy can be saved by using outside air directly for cooling in data centers in the north. In a study by researchers of Helsinki Institute for Information Technology HIIT and the University of Helsinki, computers functioned correctly over extended periods of time when run in harsh winter temperatures. Commercial, off-the-shelf computers ran well even when the outside temperature was -22C (-8F).

In the north, cooling data centers consumes lots of energy. According to an analysis published by HP in February 2009, data centers would be the sixth-largest consumer of electricity if they were classified as a separate industry. Research conducted in Helsinki Institute for Information Technology HIIT and the University of Helsinki aims at finding energy-saving potential in computing.

In the still on-going experiment by Professor Jussi Kangasharju and Researcher Mikko Pervilä servers have been kept running in a tent on a roof terrace in Finland for half a year. This is the first time computers have been run in a scientific experiment covering so wide a range of temperatures and humidity. Researchers follow how the servers run when temperatures and humidity changes naturally and the computers are only protected from direct snow, water and sunshine. When the outdoor temperatures have gone down to -22C (-8F), the temperature in the tent has been around -5C (+23F) because the computers heated up the tent.

- We are surprised at how well the servers have run compared to computers indoors. This means that data centers can be cooled in Northern Europe and Northern America with outside air efficiently without energy-consuming cooling and without computers functioning in a less stable manner due to changes in temperature and humidity, says Professor Kangasharju.

The study has been published in the Proceedings of the first ACM SIGCOMM workshop on Green networking.

Helsinki Institute for Information Technology HIIT is a joint research institute of Aalto University and the University of Helsinki for basic and applied research on information technology.

More information:

Jussi Kangasharju, professor

Helsinki Institute for Information Technology HIIT

Tel. +358 50 415 1708

e-mail: firstname.lastname@hiit.fi

Published article:

http://conferences.sigcomm.org/sigcomm/2010/papers/green/p9.pdf

Pictures about the experiments in Flickr:

http://www.flickr.com/photos/tags/runningserversaroundzerodegrees/

Presentation on the experiment held in Green Networking 2010:

http://www.cs.helsinki.fi/u/pervila/SIGCOMM2010/GreenNetworking_Presentation.pdf

Created date

11.10.2010 - 11:21

Professor Sasu Tarkoma is promoter of corporate collaboration of 2016

This University of Helsinki prize was awarded for the first time ever.

Sasu Tarkoma, professor of computer science, has been exemplary in promoting collaboration between the University of Helsinki and the corporate world, the university states as the reasoning behind the prize.

He has brought the university new funding through corporate collaboration, and has opened up new avenues in teaching and open data. In addition, Professor Tarkoma participates in university-based startup work, says Vice-Rector Pertti Panula, who gave away the prize.

It’s a joy to collaborate with the industries. I believe that it’s a win-win for both parties, both the university and the corporations. The secret to success is the good teamwork, and I have had the fortune to work with good teams, said Tarkoma in his thank-you speech.

_E3F5750_photo Linda Tammisto.jpg

Left-right: Maarit Haataja, Sasu Tarkoma, Antti Neimala, Pertti Panula

 

TKO-äly and some of the best IT employers in Finland are organising a recruitment event for students on 14.12.2016

TKO-äly, an organisation of Computer Science students at the University of Helsinki, and some of the best IT employers in Finland are joining forces for a recruitment event for students at Kumpula. The event takes place in Exactum on Wednesday the 14th of December, 2016 starting at 12:00. Join us for interesting lectures, workshops and casual chatting with representatives from collaborating companies.

New MSc programme in Data Science — apply now!

The University of Helsinki has established a new international Master's programme in Data Science. View a video interview here and see more information on Data Science MSc programme web pages. The call is open now and closes on January 12th, 2017.

Application period for Master's programme in Computer Science has begun

The renewed Master's programmes at the University of Helsinki will start in autumn 2017, and applications for the programmes started at the beginning of December 2016, see news item. One of these programmes is the Master's programme in Computer Science. The Youtube video of the programme you can watch here. More information on the programme is available on its web pages. The application periods will end on January 12th, 2017.